Finding the Fourth Proportional to 1,417.45, 2,117.25 and 1,391.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,417.45 : 2,117.25 = 1,391.50 : x
2. Step 2: Convert to fraction form
   1,417.45/2,117.25 = 1,391.50/x
3. Step 3: Cross multiply
   1,417.45x = 2,117.25 × 1,391.50
4. Step 4: Simplify right side
   1,417.45x = 2,946,153.38
5. Step 5: Solve for x
   x = 2,946,153.38/1,417.45
6. Step 6: Final answer
   x = 2,078.49